GI parts may not fit, these Japanese repop guns are usually a bit out of those specs.
Hudson Model Co and MSC were the two main makers/importers of these in the 80's.
Here's a few pics of one of the blank firing TSMg Japanese made (MSC made I think). They used to call these 'plug fire' blank guns.
This will fire semi auto or F/A controlled fire.
20rd magazine and there's a drum mag around here somewhere for it too.
Heavy thing.
I understand that some enterprising types are making blank firing repros now in steel and from scratch pretty much. Using a unique size blank cartridge of some sort just for their blank guns, they say they are BATF signed off as a non-gun. Not cheap at several thousand $$ a copy if you want a TSMg or an MG42.
Anyway,,,
The hardware on the stock is a somewhat heavy piece with a rail cut into the inner portion of each side. That slides onto the recv'r from the rear.
There's a locking bar that is spring loaded-that snaps upward and into the slot in the underside of the recv'r to hold the stock in position. The same small coil spring loads the TD button and by pressing and holding it down, it disengages the locking bar and allows the stock to be pulled off the recv'r to the rear.
On this particular repro the stock harware was a very loose fit on the recv'r rails. An easy fix was to glas bed the stock hardware to the recv'r.
That's the brown stuff in the pic on the inside of the rails.
Release compound was used on the rec'vr to it was & is removeable. But still a very tight fit.
That hardware is held to the stock by two screws coming in from the bottom of the grip area.
Other than that assembly you'll need the rear sling swivel and screws and the butt plate and screws,,,,and a stock.
Here's a few pics of the blank fire Repro.
